Inventor · Nisshin, JP

Narumasa Soejima

44Patents
4h-index
50Co-inventors
62Inventor score

Filing activity: Jun 22, 2005 → Jan 27, 2021

Most-cited inventions

PatentTitleAreaCited byStatus
US7777252B2 III-V hemt devices Electricity 74 Active
US9136372B2 Silicon carbide semiconductor device Electricity 32 Active
US8440524B2 Semiconductor device manufacturing method Electricity 7 Active
US8575689B2 Silicon carbide semiconductor device and manufacturing method of the same Electricity 6 Active
US8492867B2 Semiconductor device including cell region and peripheral region having high breakdown voltage structure Electricity 4 Active
US9853139B2 Semiconductor device and method for manufacturing the semiconductor device Electricity 4 Active
US8748975B2 Switching element and manufacturing method thereof Electricity 4 Active
US9954096B2 Switching device and method of manufacturing the same Electricity 3 Active
US8008749B2 Semiconductor device having vertical electrodes structure Electricity 3 Expired
US9818860B2 Silicon carbide semiconductor device and method for producing the same Electricity 3 Active
US9793376B2 Silicon carbide semiconductor device and method of manufacturing the same Electricity 3 Active
US8618555B2 Silicon carbide semiconductor device and method of manufacturing the same Electricity 2 Active
US9543428B2 Silicon carbide semiconductor device and method for producing the same Electricity 2 Active
US9773883B2 Method for manufacturing insulated gate type switching device having low-density body region and high-density body region Electricity 2 Active
US7800130B2 Semiconductor devices Electricity 1 Expired
US10290707B2 Semiconductor device Electricity 1 Active
US8975139B2 Manufacturing method of silicon carbide semiconductor device Electricity 1 Active
US9779906B2 Electron emission device and transistor provided with the same Electricity 1 Active
US9201094B2 Wafer examination device and wafer examination method Electricity 1 Active
US9142411B2 Method for producing semiconductor device Electricity 1 Active
US8525223B2 Silicon carbide semiconductor device Electricity 1 Active
US9337298B2 Silicon carbide semiconductor device and method for producing the same Electricity 1 Active
US9640655B2 Semiconductor device and manufacturing method of semiconductor device Electricity 1 Active
US10388527B2 Method of manufacturing semiconductor device Electricity 1 Active
US9257501B2 Semiconductor device Electricity 1 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.